Letters that make terse
s, e, r, t are letters that make 'terse'
terser is a word created by adding a letter to 'terse'
1 possible definitions for 'terse'
Under this definition, terse is an adjective and has the following properties:
concise is similar to terse.
"a crisp retort", "a response so curt as to be almost rude", "the laconic reply, "short and terse and easy to understand"